package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Override
    @Transactional
    public void save(DishDTO dishDTO) {
        //新增菜品基本信息
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insert(dish);
        //新增菜品口味数据
        Long dishId = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0){
            flavors.forEach(dishFlavor ->
                dishFlavor.setDishId(dishId)
            );
            dishFlavorMapper.insertBatch(dishDTO.getFlavors());
        }

    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    @Override
    @Transactional
    public void delete(List<Long> ids) {
        for (Long id : ids) {
            DishVO dishVO = dishMapper.getById(id);
            Integer status = dishVO.getStatus();
            //菜品起售中不能删除
            if (status == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
            //被套餐关联的菜品不能删除
            if (setmealDishMapper.countByDishId(id) > 0){
                throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
            }
        }
        for (Long id : ids) {
            dishMapper.deleteById(id);
            dishFlavorMapper.deleteByDishId(id);
        }

    }

    @Override
    public DishVO getById(Long id) {

        DishVO dishVO =dishMapper.getById(id);
        dishVO.setFlavors(dishFlavorMapper.getByDishId(id));
        return dishVO;
    }

    @Override
    public void update(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0){
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(dishDTO.getId());
            }
            dishFlavorMapper.insertBatch(dishDTO.getFlavors());

        }

    }

    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish = new Dish().builder()
                .status(status)
                .id(id)
                .updateTime(LocalDateTime.now())
                .updateUser(BaseContext.getCurrentId())
                .build();
        dishMapper.update(dish);
    }

    @Override
    public List<Dish> list(Long categoryId) {
        return dishMapper.list(categoryId);
    }
}
